Valve-seat-dressing device.



No. 817,260. PATENTED APR. 10, 1906.

D. E. LYNAM.

VALVE SEAT DRESSING DEVICE. APPLICATION FILED 0014. 1905.

v gamma Wane/0mm V M @MMW 1. NIE ST -S 'rn Specification of Letters Patent.

Patented April 10, 1906.

Application filed October 4,1905- Serial No. 281,252.

T on whom it may concern.-

Be it known that I, DANIEL E. LYNAM, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Valve Seat Dressing Devices, of which the following is a specification.

This invention consists of a device intended to be connected to a valve-seat plate for the purpose of. dressing or refitting the said seat, so that the wearing-surface of the same will have an even or uniform flat surface. This is accomplished by a grinder attachable by means of a screw threaded rod passing through a central hole in the grinding-blade and is screwed into a threaded hole in the valve-seat plate, and the grinder is operated by a ratchet-handle and has means for adjusting the pressure on the same.

In the accompanying drawings, Figure l is a side view of a valve -seat piece and the grinding attachment. Fig. 2 is a sectional elevation of the same. Fig. 3 is a plan view of the grinder and the valve-seat. Fig. 4 is a bottom View of the grinder, and Fig. 5 is a detail of the ratchet device.

Referring specifically to the drawings, indicates the valve-seat piece or plate having openings 1O through the same and a central screw-threaded hole 10 11 is the grinding or cutting blade. This consists of a plate having two longitudinal concave surfaces 11 on the lower side, the edges 11 forming cutting edges for grinding the valve-seat. The grinding-piece 11 has a central hole (not threaded) through which the rod 12 passes, the said rod being screwed into the valve-seat piece 10. The grinder 11 has a circular socket 11 in the top, at the opposits edges of which are notches 11.

13 is a handheld, which consists of a vertical post having a bore 13, through which the rod 12 passes, the lower end of the post being provided with two projections 18', which engage the notches 11 in the grinder. The upper end of the post has a hollow stem 13, which passes through a ratchet device, consisting of a ratchet-wheel 13, fixed to the stem 13 and a handle 14, mounted on the stem and provided with a pawl 14*, which operates the ratchet-wheel. 15 is an adjustingwheel nut on the screw-rod 12 for regulating the pressure of the grinder against the valveseat.

In use the rod 12 is screwed into the valveseat piece and the grinding-plate tightened against the same by the wheel-nut 15. Then by holding the scat-piece in a vise or the like the grinder may be turned and the sea ground down flat and true.

What I claim as new, and desire to secure by Letters Patent, is-

A valve-seat-dressing device comprising a rod threaded at one end to engage the work and at the other to receive a nut, a plate 011 the rod having cutting edges on its face and notches in its back, an elongated handle-post sleeved on the rod behind the plate and having projections at its lower end engaging the notches and a reduced stem at its upper end provided with a ratchet-wheel, and a handle fitting upon said stem and having a pawl engaging the ratchet.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

DANIEL E. LYNAM.

Witnesses:

SIGNA FnL'rsKoe, H. G. BATGHELOR. 

